WO2018235208A1 - ユーザ端末及び無線通信方法 - Google Patents
ユーザ端末及び無線通信方法 Download PDFInfo
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- WO2018235208A1 WO2018235208A1 PCT/JP2017/022913 JP2017022913W WO2018235208A1 WO 2018235208 A1 WO2018235208 A1 WO 2018235208A1 JP 2017022913 W JP2017022913 W JP 2017022913W WO 2018235208 A1 WO2018235208 A1 WO 2018235208A1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/08—Testing, supervising or monitoring using real traffic
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- H04B17/30—Monitoring; Testing of propagation channels
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- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0083—Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
- H04W36/0085—Hand-off measurements
- H04W36/0088—Scheduling hand-off measurements
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W48/00—Access restriction; Network selection; Access point selection
- H04W48/16—Discovering, processing access restriction or access information
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- H04W48/08—Access restriction or access information delivery, e.g. discovery data delivery
- H04W48/12—Access restriction or access information delivery, e.g. discovery data delivery using downlink control channel
Definitions
- the present invention relates to a user terminal and a wireless communication method in a next-generation mobile communication system.
- LTE Long Term Evolution
- Non-Patent Document 1 LTE Advanced, LTE Rel. 10, 11, 12, 13
- LTE Rel. 8, 9 LTE Rel. 8, 9
- LTE successor system for example, FRA (Future Radio Access), 5G (5th generation mobile communication system), 5G + (plus), NR (New Radio), NX (New radio access), FX (Future generation radio access), LTE Also referred to as Rel. 14 or 15).
- a user terminal transmits a synchronization signal (PSS (Primary Synchronization Signal) by an initial access procedure (also called cell search). And / or detects a secondary synchronization signal (SSS), synchronizes with a network (for example, a base station (eNB (eNode B))), and identifies a cell to be connected (for example, by a cell ID (Identifier)) Identify).
- PSS Primary Synchronization Signal
- SSS Secondary Synchronization Signal
- the user terminal is a master information block (MIB: Master Information Block) transmitted on a broadcast channel (PBCH: Physical Broadcast Channel) after cell search, and a downlink (DL) shared channel (PDSCH: Physical Downlink Shared Channel).
- MIB Master Information Block
- PBCH Physical Broadcast Channel
- PDSCH Physical Downlink Shared Channel
- E-UTRA Evolved Universal Terrestrial Radio Access
- E-UTRAN Evolved Universal Terrestrial Radio Access Network
- synchronization signals also called PSS and / or SSS or NR-PSS and / or NR-SSS etc.
- broadcast channels also PBCH or NR-PBCH etc.
- SS synchronization signal block
- SS burst SS burst set which is a set of one or more SS bursts is repeated at a predetermined cycle.
- received power for example, RSRP: Reference Signal Received Power
- received quality for example, RSRQ: Reference Signal Received Quality or SINR: Signal to Interference plus Noise Ratio
- RSSI for example, Reference Signal Strength Indicator
- RRM measurement Radio Resource Management Measurement
- the SS blocks are actually transmitted in the SS burst set. It is desirable to notify the user terminal of an SS block. However, when the user terminal is notified of the SS block actually transmitted, there is a risk that the processing load and / or signaling overhead on the network side may increase.
- the present invention has been made in view of the foregoing, and provides a user terminal and a wireless communication method capable of efficiently performing measurement while suppressing an increase in processing load and / or signaling overhead on the network side. Make one of the goals.
- a user terminal in a measurement period of a predetermined cycle, based on a reception unit that receives SS block transmission information indicating a synchronization signal (SS) block transmitted in a serving cell, and the SS block transmission information. And a controller configured to control the measurement of the serving cell.
- SS synchronization signal
- measurement can be efficiently performed while suppressing an increase in processing load and / or signaling overhead on the network side.
- FIGS. 1A to 1D are diagrams showing an example of the configuration of the SS block.
- FIGS. 2A and 2B illustrate an example of SS burst set.
- FIGS. 3A and 3B are diagrams showing an example of setting of SS burst sets in a plurality of cells. It is a figure which shows an example of control of the measurement which concerns on a 1st aspect. It is a figure which shows an example of control of the measurement which concerns on a 2nd aspect. It is a figure which shows an example of control of the measurement which concerns on a 3rd aspect. It is a figure which shows an example of control of the measurement which concerns on a 4th aspect. It is a figure which shows an example of schematic structure of the radio
- a resource unit including at least a synchronization signal and a broadcast channel is defined as a synchronization signal (SS) block It is considered to perform communication (for example, initial access and / or measurement) using the SS block.
- SS synchronization signal
- the SS block may be, for example, a primary synchronization signal (also referred to as PSS, NR-PSS, a first synchronization signal or a first synchronization channel, etc.) and / or a secondary synchronization signal (SSS, NR-SSS, a second synchronization signal or It may include at least a second synchronization channel or the like) and a broadcast channel (PBCH: Physical Broadcast Channel, NR-PBCH, broadcast signal, master information block (MIB: Master Information Block) or system information or the like).
- a synchronization signal different from PSS and SSS (for example, TSS: Tertiary SS) may be included in the SS block.
- NR-PSS and / or NR-SSS are also referred to as NR-PSS / SSS.
- the SS block is composed of one or more symbols (for example, OFDM symbols). Specifically, the SS block may be composed of a plurality of consecutive symbols.
- NR-PSS, NR-SSS and NR-PBCH may be arranged in one or more different symbols. For example, it is also considered that an SS block is configured of four symbols including one symbol NR-PSS, one symbol NR-SSS, and two symbols NR-PBCH.
- FIG. 1 is a diagram showing an example of the configuration of the SS block.
- FIGS. 1A to 1D illustrate SS blocks configured by four symbols, the configuration of the SS blocks is not limited to those shown in FIGS. 1A to 1D.
- the NR-PBCH may be arranged in three or more symbols, and the SS block may be composed of five or more symbols.
- the NR-PBCH may be placed in two consecutive symbols after NR-PSS and NR-SSS (FIG. 1A) or in two consecutive symbols between NR-PSS and NR-SSS. May be (FIG. 1D).
- NR-PBCH may be discretely arranged in one symbol after NR-PSS and one symbol after NR-SSS (FIG. 1B), or one symbol before NR-PSS. It may be discretely arranged in one symbol after NR-SSS (FIG. 1C).
- NR-PSS / SSS and NR-PBCH may be mapped to frequency regions (or frequency bands) of different bandwidths (the number of resource blocks).
- the NR-PSS / SSS may be mapped to a first frequency domain (eg, 127 series (or 127 subcarriers)), and the NR-PBCH may be mapped to a second frequency domain (eg, 288) wider than the first frequency domain. (Subcarrier) may be mapped.
- a reference signal used for demodulation of NR-PBCH may be mapped to at least a part of the second frequency region.
- DMRS demodulation reference signal
- the frequency domain for example, the number of subcarriers constituting NR-PSS / SSS and NR-PBCH is not limited to the above value.
- the first frequency region to which NR-PSS / SSS is mapped and the second frequency region to which NR-PBCH is mapped may be arranged to at least partially overlap.
- the center frequencies of NR-PSS, NR-SSS and NR-PBCH may be arranged to coincide with each other.
- a set of one or more SS blocks configured as described above may be referred to as an SS burst.
- the SS burst may be composed of SS blocks in which frequency and / or time resources are continuous, and may be composed of SS blocks in which frequency and / or time resources are non-consecutive.
- the SS bursts may be set with a predetermined period (which may be called an SS burst period) or may be set with a non-period.
- one or more SS bursts may be referred to as an SS burst set (SS burst series).
- a radio base station BS (Base Station), transmission / reception point (TRP: Transmission / Reception Point), eNB (eNode B), gNB (gNode B), etc.
- TRP Transmission / Reception Point
- eNB eNode B
- gNB gNode B
- NR-PSS, NR-SSS, and NR-PBCH also referred to as NR-PSS / SSS / PBCH etc.
- the SS burst set is set periodically.
- the UE may control the reception process assuming that SS burst sets are transmitted periodically (with SS burst set period).
- FIG. 2 is a diagram illustrating an example of the SS burst set.
- the radio base station gNB
- the radio base station may transmit different SS blocks using different beams with temporally different beam directivity (beam sweeping).
- FIGS. 2A and 2B show an example using multiple beams, it is also possible to transmit an SS block using a single beam.
- SS bursts are composed of one or more SS blocks, and SS burst sets are composed of one or more SS bursts.
- the SS burst is composed of 8 SS blocks # 0 to # 7, but is not limited thereto.
- the SS blocks # 0 to # 7 may be transmitted by different beams # 0 to # 7 (FIG. 2A).
- the SS burst set including the SS blocks # 0 to # 7 may be transmitted so as not to exceed a predetermined period (for example, 5 ms or less, also referred to as an SS burst set period). Since the SS burst set period changes according to the number of SS bursts (or SS blocks) in the SS burst set, it may be reworded as the number of SS bursts (or SS blocks).
- a predetermined period for example, 5 ms or less, also referred to as an SS burst set period. Since the SS burst set period changes according to the number of SS bursts (or SS blocks) in the SS burst set, it may be reworded as the number of SS bursts (or SS blocks).
- the SS burst set may be repeated in a predetermined cycle (for example, also 5, 10, 20, 40, 80 or 160 ms, also referred to as an SS burst set cycle, etc.).
- the timing (also referred to as SS burst set timing or the like) of the SS burst set may be set based on at least one of the SS burst set period, the SS burst set period, and a predetermined offset value.
- Each SS block in the SS burst set shown in FIG. 2B is identified by predetermined identification information (SS block identification information).
- the SS block identification information may be an index (SS block index) that uniquely identifies SS blocks in the SS burst set.
- the SS block identification information may be a combination of an SS block index uniquely identifying the SS block in the SS burst and an index (SS burst index) uniquely identifying the SS burst in the SS burst set.
- the SS burst index is common to SS blocks in the same SS burst.
- NR-PSS / SSS / PBCH is mutually associated with such SS block identification information.
- the user terminal assumes that NR-PSS / SSS / PBCH corresponding to the same SS block index is transmitted on the same antenna port (for example, with the same beam or with the same precoding applied) May be Also, at least one of a sequence of NR-PSS / SSS / PBCH, a mapping position (time and / or frequency resource), etc. may be associated with the SS block index.
- the SS block transmission information may be, for example, information indicating the time position of the SS block to be actually transmitted among time positions of the SS block that are set in a nominally manner.
- a future wireless communication system for example, 5 G or NR
- FIG. 3 is a diagram showing an example of setting of SS burst sets in a plurality of cells.
- a plurality of cells provided on the same carrier frequency also referred to as component carrier (CC) or frequency band
- CC component carrier
- cells A and C have greater coverage than cells B and D. Note that at least a part of the coverage may overlap in at least two of the cells AB.
- the period (SS burst set period) of the SS burst set including the SS blocks actually transmitted in each cell may be controlled based on the coverage size of each cell. For example, it is assumed that cells A and C, which have a coverage larger than cells B and D, support user terminals with relatively high moving speeds, so SS burst set period 1 is an SS burst set of cells B and D. It may be set shorter than cycle 2. On the other hand, in the cells B and D, since it is not assumed to support user terminals with high moving speeds, the SS burst set period 2 may be set longer than the SS burst set period 1 of the cells A and C.
- the SS burst set period (SS burst set period) including SS blocks actually transmitted in each cell is the number of beams swept in each cell and / or the coverage of each cell It may be controlled based on the size of. For example, in cells A and C, it is assumed that beam sweeping is performed using a larger number of beams than cells B and D, so that SS burst set period 1 is longer than cell B and D SS burst set period 2 It may be set.
- the timing of SS burst set (SS burst set timing) including SS blocks actually transmitted in each cell may be controlled in consideration of inter-cell interference. For example, in the SS burst set timing of the cell D, a predetermined offset value may be given to the SS burst set timing of the cell B.
- the network for example, a radio base station notifies the user terminal of at least one of one or more SS burst set periods, one or more SS burst set periods, and one or more SS burst set timings per frequency carrier. It is also assumed.
- one or more cells one or more serving cells and / or one or more neighbor cells
- the user terminal can perform measurement efficiently. If an actually transmitted SS block tries to notify, there is a risk that the processing load and / or signaling overhead on the network side may increase.
- the present inventors consider a transmission method of SS block transmission information that can realize efficient measurement at the user terminal while suppressing an increase in processing load and / or signaling overhead on the network side. It came to the invention.
- measurement refers to at least one of received power (eg, RSRP), received quality (eg, RSRQ or SINR, etc.) and received strength (eg, RSSI) in a cell (serving cell and / or neighboring cell). It may be shown to measure (acquire) one. Also, the measurement may include, for example, at least one of an RRM measurement, an intra-frequency measurement, an inter-frequency measurement, and a beam management measurement.
- received power eg, RSRP
- received quality eg, RSRQ or SINR, etc.
- RSSI received strength
- the measurement may include, for example, at least one of an RRM measurement, an intra-frequency measurement, an inter-frequency measurement, and a beam management measurement.
- a SS block transmitted (actually) in a serving cell and / or a neighboring cell means that at least a part of SS blocks having the same SS block index in different SS burst sets is transmitted ( Or may be sent). Therefore, even if the SS block index is indicated by the SS block transmission information, it is also assumed that the SS block having the SS block index is not transmitted in part of the periodic SS burst set.
- a user terminal receives SS block transmission information indicating SS blocks transmitted in a serving cell. Also, the user terminal controls the measurement of the serving cell based on the SS block transmission information.
- the measurement period is a period used for measurement (for example, RRM measurement) in one or more cells (one or more serving cells and / or one or more neighboring cells).
- the measurement period may be the same cycle, timing, and period as the SS burst set of a predetermined cycle that is set nominally in one or more cells.
- the measurement period may overlap with at least a part of the SS burst set of a predetermined cycle.
- information (measurement period information) indicating the period (measurement period), timing (measurement timing) and period (measurement period) of the measurement period is system information (for example, Remaining Minimum System Information) or upper layer signaling (for example, for example, it may be transmitted from the network (for example, a radio base station) to the user terminal by RRC signaling.
- the measurement period information may be information indicating at least one of a period, a timing, and a period of a formal SS burst set.
- the SS block transmission information may be a list of SS block indexes of SS blocks transmitted in one or more serving cells in at least a part of the measurement period. Also, the SS block transmission information may be commonly used for one or more serving cells, and the SS block indicated by the SS block transmission information may be transmitted by at least one of the serving cells.
- the SS block transmission information may be transmitted from the network (for example, a radio base station) to the user terminal by system information (for example, RMSI) or upper layer signaling (for example, RRC signaling).
- FIG. 4 is a diagram showing an example of control of measurement according to the first aspect.
- the cell A is a serving cell of the user terminal and the cells B to D are peripheral cells of the user terminal.
- the serving cell may be one or more cells.
- a measurement period of a predetermined cycle is set.
- the user terminal receives a list indicating SS block indexes of SS blocks actually transmitted in serving cell A.
- the list may include N SS block indexes ⁇ # 0, # 1, ..., # N-1 ⁇ .
- the N SS block indexes may not be continuous, and may be SS block indexes of at least one SS block in the SS burst set.
- the user terminal when the user terminal performs measurement using an SS block, (1) the user terminal searches for NR-PSS / SSS included in the SS block in a measurement period set in a predetermined cycle, and NR-PSS / The timing of measurement and cell ID are detected based on the SSS. (2) The user terminal measures at least one of reception power (for example, RSRP), reception quality (for example, RSRQ) and reception strength (for example, RSSI) of the SS block. (3) The user terminal performs blind detection on the SS block index of the SS block based on NR-PBCH or DMRS in the SS block.
- reception power for example, RSRP
- reception quality for example, RSRQ
- RSSI reception strength
- the user terminal since the user terminal receives a list indicating SS block indexes of SS blocks actually transmitted in serving cell A, it is necessary to blindly detect all SS block indexes in the entire measurement period of the predetermined cycle for serving cell A. Instead, measurement is performed using one or more SS blocks ⁇ # 0, # 1,..., # N-1 ⁇ actually transmitted by the serving cell A based on the above list.
- the target of the blind detection in (3) serving cell A can be limited based on the above-mentioned list, and the efficiency of measurement can be improved.
- the user terminal performs blind detection on all SS block indexes throughout the measurement period, detects SS blocks transmitted in at least a part of the measurement period, and detects the detected SS. Use the block to measure.
- SS blocks are not actually transmitted in some measurement periods (for example, the second and third measurement periods from the left) repeated in a predetermined cycle, but the user terminal In the period including the measurement period, it is necessary to perform blind detection assuming all SS block indexes including SS blocks not actually transmitted.
- the neighboring cells B to D in FIG. 4 although SS blocks are transmitted in part of one measurement period, the user terminal can not recognize the SS blocks in advance. For this reason, the user terminal needs to blindly detect all SS block indexes in one measurement period in neighboring cells B to D.
- the user terminal is in synchronization with the serving cell A, and at least one of radio frame timing, slot timing in the radio frame, symbol timing and the like is known. Since each SS block index is defined to be available only at a specific timing within a radio frame or within a predetermined period within a radio frame, the user terminal is an SS block index of SS blocks actually transmitted in serving cell A. Upon receipt of the list indicating “1”, it is known at which timing within a radio frame or within a predetermined period within a radio frame each SS block is transmitted. Therefore, for the serving cell A, (1) the timing of measurement in the measurement period can be limited, and the efficiency of measurement can be improved.
- the user terminal can limit the scope of blind detection of the SS block index. , It is possible to improve the efficiency of measurement in the serving cell.
- SS block transmission information indicating SS blocks actually transmitted in one or more neighboring cells is not transmitted, so there is no need to adjust between neighboring cells, and processing load on the network side, and / Or, the increase in signaling overhead can be suppressed.
- the user terminal receives SS block transmission information indicating a range of SS blocks transmitted in one or more neighboring cells.
- the user terminal controls the measurement of the neighboring cell based on the SS block transmission information.
- the SS block transmission information also includes information (range information) indicating a range of SS block indexes of SS blocks transmitted in one or more neighboring cells in at least a part of a measurement period of a predetermined cycle.
- range information may be the minimum value and the maximum value of SS block indexes within the range. Alternatively, it may be index information identifying a specific SS block index pattern defined in the specification.
- the SS block transmission information may include a list of SS block indexes (first aspect) actually transmitted by one or more serving cells and the range information.
- the SS block transmission information may be shared among a plurality of neighboring cells.
- SS blocks within the range indicated by the SS block transmission information may be transmitted by at least one of the neighboring cells.
- FIG. 5 is a diagram showing an example of control of measurement according to the second aspect.
- SS block transmission information is added to the list of SS block indexes of SS blocks actually transmitted by serving cell A, and the SS block index range of SS blocks actually transmitted by one or more neighboring cells It differs from FIG. 4 in that it includes range information to be shown.
- the list may include N SS block indexes ⁇ # 0, # 1,..., # N-1 ⁇ actually transmitted by the serving cell A.
- the range information indicates a range of M SS block indexes ⁇ # 0 to # M-1 ⁇ including SS block indexes of SS blocks actually transmitted in at least one of the neighboring cells B to D, The minimum value “0” and the maximum value “M ⁇ 1” of the range may be included.
- the range of the SS block index may include a predetermined number of SS block indexes, and the minimum value of the range is not limited to zero.
- the range information may include the SS block transmitted in at least one of the neighboring cells B to D.
- the user terminal Based on the list, the user terminal performs measurement using one or more SS blocks ⁇ # 0, # 1,..., # N-1 ⁇ actually transmitted by the serving cell A within the measurement period. On the other hand, the user terminal performs blind detection on SS blocks # 0 to # M-1 indicated by the range information for neighboring cells B to D, and detects SS blocks actually transmitted within the range.
- the SS block is not actually transmitted in some measurement periods (for example, the second and third measurement periods from the left) repeated in a predetermined cycle, but the user terminal In this measurement period, the blind detection of SS blocks # 0 to # M-1 indicated by the range information is performed. Further, in the neighboring cells B to D in FIG. 5, SS blocks are transmitted in part of one measurement period, but the user terminal can limit the range of blind detection based on the above range information.
- the user terminal limits the blind detection range of the SS block index because SS block transmission information indicates SS blocks actually transmitted in neighboring cells in at least a part of the measurement period of a predetermined cycle. It is possible to improve the efficiency of measurement in peripheral cells.
- the serving cell and the peripheral cell are synchronized and the user terminal recognizes that it is a synchronous network
- at least one of the radio frame timing of the peripheral cell, the slot timing in the radio frame and the symbol timing is known. It can be assumed that there is.
- the timing of the measurement in the measurement period can be limited by the SS block index information of the SS block actually transmitted by the neighboring cells included in the SS block transmission information, and the efficiency of the measurement can be improved.
- the processing load on the network side accompanying adjustment between the plurality of neighboring cells and / or SS block transmission information It is possible to suppress an increase in overhead accompanying signaling.
- the user terminal receives SS block transmission information indicating the range of SS blocks transmitted in each group including one or more neighboring cells.
- the user terminal controls the measurement of neighboring cells for each group based on the SS block transmission information.
- the SS block transmission information is information indicating a range of SS block indexes of SS blocks transmitted in each group including one or more neighboring cells in at least a part of a measurement period of a predetermined cycle (range information May be included.
- range information of each group may be the minimum value and the maximum value of SS block indexes within the range. The minimum value and the maximum value may be different for each group.
- range information of each group may be shared among one or more neighboring cells in the corresponding group.
- SS blocks within the range indicated by the range information of each group may be transmitted in at least one neighboring cell in the corresponding group.
- the SS block transmission information may include a list of SS block indexes (first aspect) actually transmitted by one or more serving cells and range information of each group.
- FIG. 6 is a diagram showing an example of control of measurement according to the third aspect.
- FIG. 6 differs from FIG. 5 in that the user terminal receives the above range information for each group.
- a group 1 including peripheral cells B and C and a group 2 including peripheral cell D are formed.
- the list may include N SS block indexes ⁇ # 0, # 1,..., # N-1 ⁇ actually transmitted by the serving cell A.
- the range information of group 1 may indicate L SS block indexes ⁇ # 0 to # L-1 ⁇ actually transmitted (potentially) in at least one of the neighboring cells B and C.
- the range information of group 2 may indicate a predetermined number of (possibly) SS block indexes ⁇ #X to #Y ⁇ actually transmitted in the neighboring cell D.
- the user terminal performs measurement based on the above list, using one or more SS blocks ⁇ # 0, # 1,..., # N-1 ⁇ actually transmitted by the serving cell A within the measurement period.
- the user terminal performs blind detection on SS blocks # 0 to # L-1 indicated by the range information of group 1 for the neighboring cells B and C, and detects SS blocks actually transmitted within the range.
- the user terminal performs blind detection on SS blocks #X to #Y indicated by the range information of group 2 for the neighboring cell D, and detects SS blocks actually transmitted within the range.
- the user terminal is blind to the SS block index because SS block transmission information indicates SS blocks that are actually transmitted in neighboring cells in each group in at least a part of a measurement period of a predetermined cycle.
- the range of detection can be limited, and the efficiency of measurement in peripheral cells in each group can be improved.
- the SS block transmission information is shared among a plurality of neighboring cells in the group, so the processing load on the network side associated with the coordination among the plurality of neighboring cells and / or the SS block It is possible to suppress an increase in overhead accompanying the signaling of transmission information.
- the SS block transmission information (for example, the list and / or the range information) described in the first to third aspects may be associated with at least one of the plurality of measurement periods.
- the user terminal controls the measurement in at least one of the plurality of measurement periods based on the SS block transmission information.
- the above range information may be associated with all neighboring cells of the same frequency carrier, may be associated with all listed neighboring cells, or all that is not listed. It may be associated with neighboring cells. Also, the user terminal may receive a plurality of measurement period information used for setting each of the plurality of measurement periods.
- FIG. 7 is a diagram showing an example of control of measurement according to the fourth aspect.
- FIG. 7 differs from FIGS. 4 to 6 in that a plurality of measurement periods are set in the user terminal.
- the user terminal indicates measurement period information # 1 indicating at least one of the period, timing and period of measurement period # 1, and a measurement indicating at least one of the period, timing and period of measurement period # 2.
- the period information # 2 is received.
- the user terminal sets measurement periods # 1 and # 2 based on measurement period information # 1 and # 2, respectively.
- the period, timing and period of measurement period # 1 may be identical to the period, timing and period of the formal SS burst set in serving cell A.
- the period, timing and period of measurement period # 2 may be identical to the period, timing and period of formal SS burst sets in serving cells B-D.
- the period of measurement period # 2 is longer than the period of measurement period # 1. Also, the period (time length) of the measurement period # 2 may be shorter than the period of the measurement period # 1.
- measurement period # 1 (or measurement period information # 1) and SS block index of SS block actually transmitted in serving cell A ⁇ # 0, # 1,.
- a list (including a block index) is associated.
- the measurement period # 1 and the SS block transmitted by the serving cell A may at least partially overlap (in FIG. 7, the entire period).
- a measurement period # 2 (or measurement period information # 2) is associated with a range (or range information indicating the range) including SS blocks actually transmitted in the neighboring cells B to D. As shown in FIG. 7, at least a part (the entire period in FIG. 7) of measurement period # 2 and a predetermined period including SS blocks transmitted in neighboring cells B to D may overlap.
- the SS block index associated with the measurement period # 1 includes N SS block indexes ⁇ # 0, # 1, ..., # N-1 ⁇ actually transmitted in the serving cell A. It is also good.
- the user terminal performs blind detection on SS blocks # 0 to # M-1 indicated by the above range information for neighboring cells B to D, and detects SS blocks actually transmitted within the range. The user terminal may measure neighboring cells B to D using the detected SS block.
- measurement period # 1 is associated with the SS block index of SS blocks actually transmitted by serving cell A, the measurement load using SS blocks transmitted by serving cell A in measurement period # 1 is reduced. it can.
- measurement period # 2 is associated with a range including SS blocks actually transmitted in at least one of neighboring cells B to D, SS blocks transmitted in neighboring cells B to D in measurement period # 2 It is possible to reduce the measurement load using.
- the SS block transmission information indicates the range of SS blocks transmitted in one or more neighboring cells.
- the SS block transmission information may include one or more neighboring cells. It may indicate an SS block transmitted in a cell.
- the SS block transmission information may be a list of SS block indexes of SS blocks transmitted in one or more neighboring cells in at least a part of a measurement period of a predetermined cycle.
- the above list may be associated with all neighboring cells of the same frequency carrier, may be associated with all listed neighboring cells, or all neighboring cells not listed. May be associated with When the above list is used, the load of blind detection in the user terminal in the measurement period can be suppressed as compared to the case where the range information is used.
- wireless communication system Hereinafter, the configuration of the radio communication system according to the present embodiment will be described. In this wireless communication system, communication is performed using any one of the above aspects of the present invention or a combination thereof.
- FIG. 8 is a diagram showing an example of a schematic configuration of a wireless communication system according to the present embodiment.
- the radio communication system 1 applies carrier aggregation (CA) and / or dual connectivity (DC) in which a plurality of basic frequency blocks (component carriers) each having a system bandwidth (for example, 20 MHz) of the LTE system as one unit are integrated. can do.
- CA carrier aggregation
- DC dual connectivity
- the wireless communication system 1 includes LTE (Long Term Evolution), LTE-A (LTE-Advanced), LTE-B (LTE-Beyond), SUPER 3G, IMT-Advanced, 4G (4th Generation mobile communication system), 5G It may be called (5th generation mobile communication system), FRA (Future Radio Access), New-RAT (Radio Access Technology), NR or the like, or it may be called a system for realizing these.
- LTE Long Term Evolution
- LTE-A LTE-Advanced
- LTE-B LTE-Beyond
- SUPER 3G IMT-Advanced
- 5G It may be called (5th generation mobile communication system)
- FRA Full Radio Access
- New-RAT Radio Access Technology
- NR Radio Access Technology
- the radio communication system 1 includes a radio base station 11 forming a macrocell C1 with a relatively wide coverage, and radio base stations 12 (12a to 12c) disposed in the macrocell C1 and forming a small cell C2 narrower than the macrocell C1. And. Moreover, the user terminal 20 is arrange
- the user terminal 20 can be connected to both the radio base station 11 and the radio base station 12. It is assumed that the user terminal 20 simultaneously uses the macro cell C1 and the small cell C2 by CA or DC. Also, the user terminal 20 may apply CA or DC using a plurality of cells (CCs) (for example, 5 or less CCs, 6 or more CCs). For example, in DC, MeNB (MCG) applies an LTE cell, and SeNB (SCG) performs communication using NR / 5G-cell.
- MCG MeNB
- SCG SeNB
- Communication can be performed between the user terminal 20 and the radio base station 11 using a relatively low frequency band (for example, 2 GHz) and a carrier having a narrow bandwidth (referred to as an existing carrier, Legacy carrier, etc.).
- a carrier having a wide bandwidth in a relatively high frequency band for example, 3.5 GHz, 5 GHz, etc.
- a relatively high frequency band for example, 3.5 GHz, 5 GHz, etc.
- the configuration of the frequency band used by each wireless base station is not limited to this.
- a wired connection for example, an optical fiber conforming to a Common Public Radio Interface (CPRI), an X2 interface, etc.
- a wireless connection Can be configured.
- the radio base station 11 and each radio base station 12 are connected to the higher station apparatus 30 and connected to the core network 40 via the higher station apparatus 30.
- the upper station apparatus 30 includes, for example, an access gateway apparatus, a radio network controller (RNC), a mobility management entity (MME), and the like, but is not limited thereto. Further, each wireless base station 12 may be connected to the higher station apparatus 30 via the wireless base station 11.
- RNC radio network controller
- MME mobility management entity
- the radio base station 11 is a radio base station having a relatively wide coverage, and may be called a macro base station, an aggregation node, an eNB (eNodeB), a transmission / reception point, or the like.
- the radio base station 12 is a radio base station having local coverage, and is a small base station, a micro base station, a pico base station, a femto base station, a HeNB (Home eNodeB), an RRH (Remote Radio Head), transmission and reception It may be called a point or the like.
- the radio base stations 11 and 12 are not distinguished, they are collectively referred to as the radio base station 10.
- Each user terminal 20 is a terminal compatible with various communication schemes such as LTE and LTE-A, and may include not only mobile communication terminals (mobile stations) but also fixed communication terminals (fixed stations).
- orthogonal frequency division multiple access (OFDMA) is applied to the downlink as a radio access scheme, and single carrier frequency division multiple access (SC-FDMA: single carrier) to the uplink.
- SC-FDMA single carrier frequency division multiple access
- OFDMA is a multicarrier transmission scheme in which a frequency band is divided into a plurality of narrow frequency bands (subcarriers) and data is mapped to each subcarrier to perform communication.
- SC-FDMA is a single carrier transmission scheme that divides the system bandwidth into bands consisting of one or continuous resource blocks for each terminal, and a plurality of terminals use different bands to reduce interference between the terminals. is there.
- the uplink and downlink radio access schemes are not limited to these combinations, and other radio access schemes may be used.
- downlink shared channels (PDSCH: Physical Downlink Shared Channel) shared by each user terminal 20, broadcast channels (PBCH: Physical Broadcast Channel, NR-PBCH), downlink L1 / L2 A control channel or the like is used.
- User data, upper layer control information, at least one of SIB (System Information Block), etc. are transmitted by PDSCH.
- a MIB Master Information Block
- a common control channel that reports the presence or absence of a paging channel is mapped to a downlink L1 / L2 control channel (for example, PDCCH), and data of a paging channel (PCH) is mapped to a PDSCH.
- a downlink reference signal, an uplink reference signal, and a physical downlink synchronization signal are separately arranged.
- the downlink L1 / L2 control channel includes PDCCH (Physical Downlink Control Channel), EPDCCH (Enhanced Physical Downlink Control Channel), PCFICH (Physical Control Format Indicator Channel), PHICH (Physical Hybrid-ARQ Indicator Channel) and the like.
- Downlink control information (DCI) including scheduling information of PDSCH and PUSCH is transmitted by PDCCH.
- the number of OFDM symbols used for PDCCH is transmitted by PCFICH.
- Delivery confirmation information (for example, also referred to as retransmission control information, HARQ-ACK, or ACK / NACK) of HARQ (Hybrid Automatic Repeat reQuest) for the PUSCH is transmitted by the PHICH.
- the EPDCCH is frequency division multiplexed with a PDSCH (downlink shared data channel), and is used for transmission such as DCI, similarly to the PDCCH.
- an uplink shared channel (PUSCH: Physical Uplink Shared Channel) shared by each user terminal 20, an uplink control channel (PUCCH: Physical Uplink Control Channel), a random access channel (PRACH: Physical Random Access Channel) or the like is used.
- PUSCH Physical Uplink Shared Channel
- PUCCH Physical Uplink Control Channel
- PRACH Physical Random Access Channel
- User data and / or upper layer control information is transmitted by PUSCH.
- downlink radio quality information CQI: Channel Quality Indicator
- delivery confirmation information etc.
- the PRACH transmits a random access preamble for establishing a connection with a cell.
- a downlink reference signal As a downlink reference signal, a cell-specific reference signal (CRS), a channel state information reference signal (CSI-RS), and a demodulation reference signal (DMRS: DeModulation). Reference Signal), Positioning Reference Signal (PRS), etc. are transmitted. Further, in the wireless communication system 1, a measurement reference signal (SRS: Sounding Reference Signal), a demodulation reference signal (DMRS), and the like are transmitted as uplink reference signals.
- SRS Sounding Reference Signal
- DMRS demodulation reference signal
- DMRS may be called a user terminal specific reference signal (UE-specific Reference Signal). Also, reference signals to be transmitted are not limited to these.
- FIG. 9 is a diagram showing an example of the entire configuration of the radio base station according to the present embodiment.
- the radio base station 10 includes a plurality of transmitting and receiving antennas 101, an amplifier unit 102, a transmitting and receiving unit 103, a baseband signal processing unit 104, a call processing unit 105, and a transmission path interface 106. Note that each of the transmitting and receiving antenna 101, the amplifier unit 102, and the transmitting and receiving unit 103 may be configured to include one or more.
- User data transmitted from the radio base station 10 to the user terminal 20 by downlink is input from the higher station apparatus 30 to the baseband signal processing unit 104 via the transmission path interface 106.
- the baseband signal processing unit 104 performs packet data convergence protocol (PDCP) layer processing, user data division / combination, RLC layer transmission processing such as RLC (Radio Link Control) retransmission control, and MAC (Medium Access) for user data.
- Control Transmission processing such as retransmission control (for example, HARQ transmission processing), scheduling, transmission format selection, channel coding, inverse fast Fourier transform (IFFT) processing, precoding processing, etc. It is transferred to 103. Also, with regard to the downlink control signal, transmission processing such as channel coding and / or inverse fast Fourier transform is performed and transferred to the transmission / reception unit 103.
- the transmission / reception unit 103 converts the baseband signal output from the baseband signal processing unit 104 for each antenna into a radio frequency band and transmits the baseband signal.
- the radio frequency signal frequency-converted by the transmitting and receiving unit 103 is amplified by the amplifier unit 102 and transmitted from the transmitting and receiving antenna 101.
- the transmission / reception unit 103 can be configured of a transmitter / receiver, a transmission / reception circuit, or a transmission / reception device described based on the common recognition in the technical field according to the present invention.
- the transmitting and receiving unit 103 may be configured as an integrated transmitting and receiving unit, or may be configured from a transmitting unit and a receiving unit.
- the radio frequency signal received by the transmission / reception antenna 101 is amplified by the amplifier unit 102.
- the transmitting and receiving unit 103 receives the upstream signal amplified by the amplifier unit 102.
- the transmission / reception unit 103 frequency-converts the received signal into a baseband signal and outputs the result to the baseband signal processing unit 104.
- the baseband signal processing unit 104 performs Fast Fourier Transform (FFT) processing, Inverse Discrete Fourier Transform (IDFT) processing, and error correction on user data included in the input upstream signal. Decoding, reception processing of MAC retransmission control, and reception processing of RLC layer and PDCP layer are performed, and are transferred to the higher station apparatus 30 via the transmission path interface 106.
- the call processing unit 105 performs at least one of setting of a communication channel, call processing such as releasing, status management of the wireless base station 10, and management of a wireless resource.
- the transmission path interface 106 transmits and receives signals to and from the higher station apparatus 30 via a predetermined interface. Also, the transmission path interface 106 transmits / receives signals (backhaul signaling) to / from the other wireless base station 10 via an inter-base station interface (for example, an optical fiber conforming to CPRI (Common Public Radio Interface), X2 interface). May be
- an inter-base station interface for example, an optical fiber conforming to CPRI (Common Public Radio Interface), X2 interface.
- the transmitting and receiving unit 103 transmits a synchronization signal (SS) block. Also, the transmission / reception unit 103 transmits SS block transmission information. Also, the transmission / reception unit 103 may transmit one or more measurement period information.
- SS synchronization signal
- FIG. 10 is a diagram showing an example of a functional configuration of a radio base station according to the present embodiment.
- the functional block of the characteristic part in this embodiment is mainly shown, and the wireless base station 10 also has another functional block required for wireless communication.
- the baseband signal processing unit 104 at least includes a control unit (scheduler) 301, a transmission signal generation unit 302, a mapping unit 303, a reception signal processing unit 304, and a measurement unit 305. Note that these configurations may be included in the wireless base station 10, and some or all of the configurations may not be included in the baseband signal processing unit 104.
- the baseband signal processing unit 104 has a digital beamforming function of providing digital beamforming.
- a control unit (scheduler) 301 performs control of the entire radio base station 10.
- the control unit 301 can be configured of a controller, a control circuit, or a control device described based on the common recognition in the technical field according to the present invention.
- the control unit 301 generates, for example, a signal by the transmission signal generation unit 302 (including a signal corresponding to at least one of a synchronization signal, MIB, paging channel, system information, and broadcast channel), assignment of signals by the mapping unit 303, etc. Control at least one of
- the control unit 301 controls generation and transmission of an SS block including a synchronization signal and a broadcast channel (NR-PBCH). Also, the control unit 301 controls generation and / or mapping of a DMRS sequence (DMRS sequence) to be multiplexed to a symbol for NR-PBCH.
- DMRS sequence DMRS sequence
- control unit 301 controls generation and transmission of SS block transmission information regarding SS blocks transmitted in one or more serving cells and / or one or more neighboring cells.
- the SS block transmission information may indicate an SS block transmitted in the serving cell in at least a part of a measurement period of a predetermined cycle (first aspect).
- the SS block transmission information may indicate an SS block transmitted in one or more neighboring cells or a range of the SS block in at least a part of a measurement period of a predetermined cycle (second aspect, other aspects Aspect).
- the SS block transmission information may indicate an SS block transmitted in each group including one or more neighboring cells or a range of the SS block in at least a part of a measurement period of a predetermined cycle (third Aspect, other aspect).
- control unit 301 controls generation and transmission of measurement period information indicating a measurement period in the user terminal 20. Further, the control unit 301 may control generation and transmission of a plurality of measurement period information each indicating a plurality of measurement periods in which at least one of the period, timing and period is different (fourth aspect). Also, the SS block transmission information may be associated with at least one of the plurality of measurement periods.
- Transmission signal generation section 302 generates a downlink signal (at least one of downlink control signal, downlink data signal, downlink reference signal, SS block, etc.) based on an instruction from control section 301, and outputs it to mapping section 303. Do.
- the transmission signal generation unit 302 can be configured from a signal generator, a signal generation circuit or a signal generation device described based on the common recognition in the technical field according to the present invention.
- the transmission signal generation unit 302 For example, based on an instruction from the control unit 301, the transmission signal generation unit 302 generates a DL assignment for notifying downlink signal allocation information and a UL grant for notifying uplink signal allocation information. Also, coding processing and modulation processing are performed on the downlink data signal according to a coding rate, a modulation method, and the like determined based on channel state information (CSI: Channel State Information) and the like from each user terminal 20.
- CSI Channel State Information
- Mapping section 303 maps the downlink signal generated by transmission signal generation section 302 to a predetermined radio resource based on an instruction from control section 301, and outputs the mapped downlink signal to transmission / reception section 103.
- the mapping unit 303 may be configured of a mapper, a mapping circuit or a mapping device described based on the common recognition in the technical field according to the present invention.
- the reception signal processing unit 304 performs reception processing (for example, demapping, demodulation, decoding, and the like) on the reception signal input from the transmission / reception unit 103.
- the reception signal is, for example, an uplink signal (uplink control signal, uplink data signal, uplink reference signal, etc.) transmitted from the user terminal 20.
- the received signal processing unit 304 can be configured from a signal processor, a signal processing circuit or a signal processing device described based on the common recognition in the technical field according to the present invention.
- the reception signal processing unit 304 outputs the information decoded by the reception process to the control unit 301. For example, when the PUCCH including the HARQ-ACK is received, the HARQ-ACK is output to the control unit 301. Further, the reception signal processing unit 304 outputs the reception signal and the signal after reception processing to the measurement unit 305.
- the measurement unit 305 performs measurement on the received signal.
- the measuring unit 305 can be configured from a measuring device, a measuring circuit or a measuring device described based on the common recognition in the technical field according to the present invention.
- the measurement unit 305 may, for example, receive power of a received signal (for example, reference signal received power (RSRP)), reception quality (for example, reference signal received quality (RSRQ), signal to interference plus noise ratio (SINR)) and / or Or, it may measure channel conditions and the like.
- RSRP reference signal received power
- RSS reference signal received quality
- SINR signal to interference plus noise ratio
- the measurement result may be output to the control unit 301.
- FIG. 11 is a diagram showing an example of the entire configuration of the user terminal according to the present embodiment.
- the user terminal 20 includes a plurality of transmitting and receiving antennas 201, an amplifier unit 202, a transmitting and receiving unit 203, a baseband signal processing unit 204, and an application unit 205.
- each of the transmitting and receiving antenna 201, the amplifier unit 202, and the transmitting and receiving unit 203 may be configured to include one or more.
- the radio frequency signal received by the transmission / reception antenna 201 is amplified by the amplifier unit 202.
- the transmitting and receiving unit 203 receives the downlink signal amplified by the amplifier unit 202.
- the transmission / reception unit 203 frequency-converts the received signal into a baseband signal and outputs the result to the baseband signal processing unit 204.
- the transmission / reception unit 203 can be configured of a transmitter / receiver, a transmission / reception circuit or a transmission / reception device described based on the common recognition in the technical field according to the present invention.
- the transmission / reception unit 203 may be configured as an integrated transmission / reception unit, or may be configured from a transmission unit and a reception unit.
- the baseband signal processing unit 204 performs at least one of FFT processing, error correction decoding, reception processing of retransmission control, and the like on the input baseband signal.
- the downlink user data is transferred to the application unit 205.
- the application unit 205 performs processing on a layer higher than the physical layer and the MAC layer. Also, of the downlink data, broadcast information is also transferred to the application unit 205.
- uplink user data is input from the application unit 205 to the baseband signal processing unit 204.
- the baseband signal processing unit 204 performs transmission processing of retransmission control (for example, transmission processing of HARQ), channel coding, precoding, discrete Fourier transform (DFT) processing, IFFT processing, etc. It is transferred to 203.
- the transmission / reception unit 203 converts the baseband signal output from the baseband signal processing unit 204 into a radio frequency band and transmits it.
- the radio frequency signal frequency-converted by the transmitting and receiving unit 203 is amplified by the amplifier unit 202 and transmitted from the transmitting and receiving antenna 201.
- the transmitting and receiving unit 203 may further include an analog beam forming unit that performs analog beam forming.
- the analog beamforming unit comprises an analog beamforming circuit (eg, phase shifter, phase shift circuit) or an analog beamforming apparatus (eg, phase shifter) described based on common recognition in the technical field according to the present invention can do.
- the transmitting and receiving antenna 201 can be configured by, for example, an array antenna.
- the transmitting and receiving unit 203 receives the SS block. Also, the transmission / reception unit 203 receives SS block transmission information. Also, the transmission / reception unit 203 may receive one or more measurement period information. For example, the transmission / reception unit 203 may receive SS block information and / or one or more measurement period information using system information (for example, RMSI) or higher layer signaling (for example, RRC signaling).
- system information for example, RMSI
- RRC signaling for example, RRC signaling
- FIG. 12 is a diagram showing an example of a functional configuration of the user terminal according to the present embodiment.
- the functional block of the characteristic part in this embodiment is mainly shown, and it is assumed that the user terminal 20 also has other functional blocks necessary for wireless communication.
- the baseband signal processing unit 204 included in the user terminal 20 at least includes a control unit 401, a transmission signal generation unit 402, a mapping unit 403, a reception signal processing unit 404, and a measurement unit 405. Note that these configurations may be included in the user terminal 20, and some or all of the configurations may not be included in the baseband signal processing unit 204.
- the control unit 401 controls the entire user terminal 20.
- the control unit 401 can be configured of a controller, a control circuit, or a control device described based on the common recognition in the technical field according to the present invention.
- the control unit 401 controls, for example, signal generation by the transmission signal generation unit 402 and assignment of signals by the mapping unit 403. Further, the control unit 401 controls reception processing of the signal by the reception signal processing unit 404 and measurement of the signal by the measurement unit 405.
- the control unit 401 controls the SS block to be received in a predetermined frequency band or more. Also, the control unit 401 may control reception of the synchronization signal block on the assumption that the synchronization signal block is arranged in a predetermined area of the slot.
- control unit 401 controls the measurement of one or more serving cells and / or one or more neighboring cells. Specifically, the control unit 401 may control the measurement of the serving cell in the measurement period of the predetermined cycle based on the SS block transmission information indicating the SS block transmitted in the serving cell (first aspect).
- control unit 401 may control the measurement of the neighboring cells in the measurement period of the predetermined cycle based on the SS block transmitted in one or more neighboring cells or the SS block transmission information indicating the range of the SS block. (Second aspect).
- control unit 401 controls the neighboring cells in each group in a measurement period of a predetermined cycle based on SS blocks transmitted in each group including one or more neighboring cells or SS block transmission information indicating the range of the SS block. Control of the measurement (the third aspect).
- control unit 401 may control the measurement in at least one of the plurality of measurement periods.
- SS block transmission information may be associated with at least one of the plurality of measurement periods (fourth aspect).
- control unit 401 may control setting of one or more measurement periods based on the measurement period information from the radio base station 10. Specifically, the control unit 401 may control setting of a plurality of measurement periods in which at least one of the period, the timing, and the period is different (fourth aspect).
- control unit 401 may control setting of one or more measurement periods based on the measurement period information.
- control unit 401 may control blind detection (detection of SS blocks actually transmitted) of measurement periods of one or more serving cells and / or one or more neighboring cells based on the SS block transmission information. Good.
- the transmission signal generation unit 402 generates an uplink signal (uplink control signal, uplink data signal, uplink reference signal or the like) based on an instruction from the control unit 401, and outputs the uplink signal to the mapping unit 403.
- the transmission signal generation unit 402 can be configured from a signal generator, a signal generation circuit, or a signal generation device described based on the common recognition in the technical field according to the present invention.
- the transmission signal generation unit 402 generates, for example, an uplink control signal related to delivery confirmation information and / or channel state information (CSI) based on an instruction from the control unit 401. Further, the transmission signal generation unit 402 generates an uplink data signal based on an instruction from the control unit 401. For example, when the downlink control signal notified from the radio base station 10 includes a UL grant, the transmission signal generation unit 402 is instructed by the control unit 401 to generate an uplink data signal.
- CSI channel state information
- Mapping section 403 maps the uplink signal generated by transmission signal generation section 402 to a radio resource based on an instruction from control section 401, and outputs the uplink signal to transmission / reception section 203.
- the mapping unit 403 may be configured of a mapper, a mapping circuit or a mapping device described based on the common recognition in the technical field according to the present invention.
- the reception signal processing unit 404 performs reception processing (for example, demapping, demodulation, decoding, and the like) on the reception signal input from the transmission / reception unit 203.
- the reception signal is, for example, a downlink signal (a downlink control signal, a downlink data signal, a downlink reference signal, or the like) transmitted from the radio base station 10.
- the received signal processing unit 404 can be composed of a signal processor, a signal processing circuit or a signal processing device described based on the common recognition in the technical field according to the present invention. Also, the received signal processing unit 404 can constitute a receiving unit according to the present invention.
- the received signal processing unit 404 receives a synchronization signal and a broadcast channel that the radio base station applies beamforming to transmit based on an instruction from the control unit 401. In particular, it receives synchronization signals and broadcast channels that are assigned to at least one of a plurality of time domains (e.g., symbols) that make up a predetermined transmission time interval (e.g., a subframe or slot).
- a predetermined transmission time interval e.g., a subframe or slot
- the reception signal processing unit 404 outputs the information decoded by the reception process to the control unit 401.
- the received signal processing unit 404 outputs, for example, broadcast information, system information, RRC signaling, DCI, and the like to the control unit 401. Further, the reception signal processing unit 404 outputs the reception signal and the signal after reception processing to the measurement unit 405.
- the measurement unit 405 performs measurement on the received signal.
- the measurement unit 405 may measure one or more serving cells and / or one or more neighboring cells using the SS block transmitted from the radio base station 10.
- the measuring unit 405 can be configured of a measuring device, a measuring circuit or a measuring device described based on the common recognition in the technical field according to the present invention.
- the measurement unit 405 may measure, for example, received power (for example, RSRP), received quality (for example, RSRQ, received SINR), and / or channel condition and the like using the received SS block.
- the measurement result may be output to the control unit 401.
- the measurement unit 405 performs RRM measurement using a synchronization signal.
- each functional block is realized by one physically and / or logically coupled device, or directly and / or indirectly two or more physically and / or logically separated devices. It may be connected by (for example, wired and / or wireless) and realized by the plurality of devices.
- the wireless base station, the user terminal, and the like in the present embodiment may function as a computer that performs the process of the wireless communication method of the present invention.
- FIG. 13 is a diagram showing an example of the hardware configuration of the radio base station and the user terminal according to the present embodiment.
- the above-described wireless base station 10 and user terminal 20 may be physically configured as a computer device including a processor 1001, a memory 1002, a storage 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007 and the like. Good.
- the term “device” can be read as a circuit, a device, a unit, or the like.
- the hardware configuration of the radio base station 10 and the user terminal 20 may be configured to include one or more of the devices illustrated in the figure, or may be configured without including some devices.
- processor 1001 may be implemented by one or more chips.
- Each function in the radio base station 10 and the user terminal 20 is performed, for example, by causing a processor 1001 to read predetermined software (program) on hardware such as the processor 1001 and the memory 1002, and the processor 1001 performs an operation. This is realized by controlling at least one of reading and writing of data in the memory 1002 and the storage 1003.
- the processor 1001 operates, for example, an operating system to control the entire computer.
- the processor 1001 may be configured by a central processing unit (CPU: Central Processing Unit) including an interface with a peripheral device, a control device, an arithmetic device, a register, and the like.
- CPU Central Processing Unit
- the above-described baseband signal processing unit 104 (204), call processing unit 105, and the like may be realized by the processor 1001.
- the processor 1001 reads a program (program code), a software module, data, and the like from the storage 1003 and / or the communication device 1004 to the memory 1002, and executes various processing according to these.
- a program a program that causes a computer to execute at least a part of the operations described in the above embodiments is used.
- the control unit 401 of the user terminal 20 may be realized by a control program stored in the memory 1002 and operated by the processor 1001, or may be realized similarly for other functional blocks.
- the memory 1002 is a computer readable recording medium, and for example, at least at least a read only memory (ROM), an erasable programmable ROM (EPROM), an electrically EPROM (EEPROM), a random access memory (RAM), or any other suitable storage medium. It may consist of one.
- the memory 1002 may be called a register, a cache, a main memory (main storage device) or the like.
- the memory 1002 may store a program (program code), a software module, and the like that can be executed to implement the wireless communication method according to an embodiment of the present invention.
- the storage 1003 is a computer readable recording medium, and for example, a flexible disk, a floppy (registered trademark) disk, a magneto-optical disk (for example, a compact disk (CD-ROM (Compact Disc ROM), etc.), a digital versatile disk, Blu-ray® disc), removable disc, hard disc drive, smart card, flash memory device (eg card, stick, key drive), magnetic stripe, database, server, at least one other suitable storage medium May be composed of
- the storage 1003 may be called an auxiliary storage device.
- the communication device 1004 is hardware (transmission / reception device) for performing communication between computers via a wired and / or wireless network, and is also called, for example, a network device, a network controller, a network card, a communication module, or the like.
- the communication device 1004 includes, for example, a high frequency switch, a duplexer, a filter, a frequency synthesizer, and the like to realize, for example, frequency division duplex (FDD) and / or time division duplex (TDD). It may be configured.
- FDD frequency division duplex
- TDD time division duplex
- the transmission / reception antenna 101 (201), the amplifier unit 102 (202), the transmission / reception unit 103 (203), the transmission path interface 106, and the like described above may be realized by the communication device 1004.
- the input device 1005 is an input device (for example, a keyboard, a mouse, a microphone, a switch, a button, a sensor, and the like) that receives an input from the outside.
- the output device 1006 is an output device (for example, a display, a speaker, a light emitting diode (LED) lamp, and the like) that performs output to the outside.
- the input device 1005 and the output device 1006 may be integrated (for example, a touch panel).
- the devices shown in FIG. 13 are connected by a bus 1007 for communicating information.
- the bus 1007 may be configured by a single bus or may be configured by different buses among the devices.
- radio base station 10 and the user terminal 20 may be microprocessors, digital signal processors (DSPs), application specific integrated circuits (ASICs), programmable logic devices (PLDs), field programmable gate arrays (FPGAs), etc. It may be configured to include hardware, and part or all of each functional block may be realized by the hardware. For example, processor 1001 may be implemented in at least one of these hardware.
- DSPs digital signal processors
- ASICs application specific integrated circuits
- PLDs programmable logic devices
- FPGAs field programmable gate arrays
- the channels and / or symbols may be signaling.
- the signal may be a message.
- the reference signal may be abbreviated as RS (Reference Signal), and may be referred to as a pilot (Pilot), a pilot signal or the like according to an applied standard.
- a component carrier CC: Component Carrier
- CC Component Carrier
- a radio frame may be configured with one or more periods (frames) in the time domain.
- Each of the one or more periods (frames) that constitute a radio frame may be referred to as a subframe.
- a subframe may be configured with one or more slots in the time domain.
- the subframes may be of a fixed time length (e.g., 1 ms) independent of the neurology.
- a slot may be configured with one or more symbols (such as orthogonal frequency division multiplexing (OFDM) symbols, single carrier frequency division multiple access (SC-FDMA) symbols, etc.) in the time domain.
- the slot may be a time unit based on the neurology.
- the slot may include a plurality of minislots. Each minislot may be comprised of one or more symbols in the time domain.
- a radio frame, a subframe, a slot, a minislot and a symbol all represent time units when transmitting a signal.
- subframes, slots, minislots and symbols other names corresponding to each may be used.
- one subframe may be referred to as a transmission time interval (TTI)
- TTI transmission time interval
- a plurality of consecutive subframes may be referred to as a TTI
- one slot or one minislot may be referred to as a TTI.
- TTI transmission time interval
- the subframe and / or TTI may be a subframe (1 ms) in existing LTE, a period shorter than 1 ms (eg, 1-13 symbols), or a period longer than 1 ms. It may be.
- TTI refers to, for example, the minimum time unit of scheduling in wireless communication.
- the radio base station performs scheduling to allocate radio resources (such as frequency bandwidth and / or transmission power that can be used in each user terminal) to each user terminal on a TTI basis.
- the TTI may be a transmission time unit of a channel coded data packet (transport block) or may be a processing unit such as scheduling and / or link adaptation. If one slot or one minislot is referred to as TTI, one or more TTIs (ie, one or more slots or one or more minislots) may be the minimum time unit of scheduling. In addition, the number of slots (the number of minislots) constituting the minimum time unit of the scheduling may be controlled.
- a TTI having a time length of 1 ms may be referred to as a normal TTI (TTI in LTE Rel. 8-12), a normal TTI, a long TTI, a normal subframe, a normal subframe, a long subframe, or the like.
- a TTI shorter than a normal TTI may be referred to as a short TTI, a short TTI, a partial TTI (partial or fractional TTI), a short subframe, a short subframe, or the like.
- a resource block is a resource allocation unit in time domain and frequency domain, and may include one or more consecutive subcarriers (subcarriers) in the frequency domain. Also, an RB may include one or more symbols in the time domain, and may be one slot, one minislot, one subframe, or one TTI in length. One TTI and one subframe may be configured of one or more resource blocks, respectively.
- the RB may be called a physical resource block (PRB: Physical RB), a PRB pair, an RB pair, or the like.
- a resource block may be composed of one or more resource elements (RE: Resource Element).
- RE Resource Element
- one RE may be one subcarrier and one symbol radio resource region.
- the above-described structures such as the radio frame, subframe, slot, minislot and symbol are merely examples.
- the number of subframes included in a radio frame the number of slots per subframe or radio frame, the number of minislots included in a slot, the number of symbols included in a slot or minislot, and subcarriers included in an RB
- the number of symbols in TTI, symbol length, cyclic prefix (CP) length, and other configurations may be variously changed.
- the information, parameters, and the like described in the present specification may be represented by absolute values, may be represented by relative values from predetermined values, or may be represented by corresponding other information.
- the radio resources may be indicated by a predetermined index.
- the formulas etc. that use these parameters may differ from those explicitly disclosed herein.
- data, instructions, commands, information, signals, bits, symbols, chips etc may be voltage, current, electromagnetic waves, magnetic fields or particles, optical fields or photons, or any of these May be represented by a combination of
- information, signals, etc. may be output from the upper layer to the lower layer and / or from the lower layer to the upper layer.
- Information, signals, etc. may be input / output via a plurality of network nodes.
- the input / output information, signals and the like may be stored in a specific place (for example, a memory) or may be managed by a management table. Information, signals, etc. input and output can be overwritten, updated or added. The output information, signals and the like may be deleted. The input information, signals and the like may be transmitted to other devices.
- notification of information is not limited to the aspects / embodiments described herein, and may be performed in other manners.
- notification of information may be physical layer signaling (eg, downlink control information (DCI), uplink control information (UCI)), upper layer signaling (eg, RRC (Radio Resource Control) signaling, It may be implemented by broadcast information (Master Information Block (MIB), System Information Block (SIB), etc.), MAC (Medium Access Control) signaling, other signals, or a combination thereof.
- DCI downlink control information
- UCI uplink control information
- RRC Radio Resource Control
- MIB Master Information Block
- SIB System Information Block
- MAC Medium Access Control
- the physical layer signaling may be called L1 / L2 (Layer 1 / Layer 2) control information (L1 / L2 control signal), L1 control information (L1 control signal), or the like.
- RRC signaling may be referred to as an RRC message, and may be, for example, an RRC connection setup (RRC Connection Setup) message, an RRC connection reconfiguration (RRC Connection Reconfiguration) message, or the like.
- MAC signaling may be notified by, for example, a MAC control element (MAC CE (Control Element)).
- notification of predetermined information is not limited to what is explicitly performed, but implicitly (for example, by not notifying the predetermined information or another It may be performed by notification of information.
- the determination may be performed by a value (0 or 1) represented by one bit, or may be performed by a boolean value represented by true or false. , Numerical comparison (for example, comparison with a predetermined value) may be performed.
- Software may be called software, firmware, middleware, microcode, hardware description language, or any other name, and may be instructions, instruction sets, codes, code segments, program codes, programs, subprograms, software modules. Should be interpreted broadly to mean applications, software applications, software packages, routines, subroutines, objects, executables, threads of execution, procedures, functions, etc.
- software, instructions, information, etc. may be sent and received via a transmission medium.
- software may use a wired technology (coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), etc.) and / or a wireless technology (infrared, microwave, etc.), a website, a server
- wired technology coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), etc.
- wireless technology infrared, microwave, etc.
- system and "network” as used herein are used interchangeably.
- base station Base Station
- radio base station eNB
- gNB gNodeB
- cell cell
- cell group cell group
- carrier carrier
- carrier may be used interchangeably.
- a base station may also be called in terms of a fixed station (Node station), NodeB, eNodeB (eNB), access point (access point), transmission point, reception point, femtocell, small cell, and so on.
- a base station may accommodate one or more (e.g., three) cells (also called sectors). If the base station accommodates multiple cells, the entire coverage area of the base station can be partitioned into multiple smaller areas, each smaller area being a base station subsystem (eg, a small base station for indoor use (RRH: Communication services may also be provided by the Remote Radio Head, where the term "cell” or “sector” refers to part or all of the coverage area of a base station and / or a base station subsystem serving communication services in this coverage. Point to.
- RRH Small base station for indoor use
- MS mobile station
- UE user equipment
- a base station may also be called in terms of a fixed station (Node station), NodeB, eNodeB (eNB), access point (access point), transmission point, reception point, femtocell, small cell, and so on.
- Node station Node station
- NodeB NodeB
- eNodeB eNodeB
- access point access point
- transmission point reception point
- femtocell small cell, and so on.
- the mobile station may be a subscriber station, a mobile unit, a subscriber unit, a wireless unit, a remote unit, a mobile device, a wireless device, a wireless communication device, a remote device, a mobile subscriber station, an access terminal, a mobile terminal, a wireless terminal, by those skilled in the art. It may also be called a terminal, a remote terminal, a handset, a user agent, a mobile client, a client or some other suitable term.
- the radio base station in the present specification may be replaced with a user terminal.
- each aspect / embodiment of the present invention may be applied to a configuration in which communication between a wireless base station and a user terminal is replaced with communication between a plurality of user terminals (D2D: Device-to-Device).
- the user terminal 20 may have a function that the above-described radio base station 10 has.
- “up” and / or “down” may be read as “side”.
- the upstream channel may be read as a side channel.
- a user terminal herein may be read at a radio base station.
- the radio base station 10 may have a function that the above-described user terminal 20 has.
- the specific operation to be performed by the base station may be performed by the upper node in some cases.
- various operations performed for communication with a terminal may be a base station, one or more network nodes other than the base station (eg, It is apparent that this can be performed by MME (Mobility Management Entity), S-GW (Serving-Gateway), etc. but not limited thereto or a combination thereof.
- MME Mobility Management Entity
- S-GW Serving-Gateway
- Each aspect / embodiment described in the present specification includes LTE (Long Term Evolution), LTE-A (LTE-Advanced), LTE-B (LTE-Beyond), SUPER 3G, IMT-Advanced, 4G (4th generation mobile) Communication system), 5G (5th generation mobile communication system), FRA (Future Radio Access), New-RAT (Radio Access Technology), NR (New Radio), NX (New radio access), FX (Future generation radio access), GSM (registered trademark) (Global System for Mobile communications), CDMA2000, UMB (Ultra Mobile Broadband), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802 .20, UWB (Ultra-Wide Band), Bluetooth (registered trademark),
- the present invention may be applied to a system utilizing another appropriate wireless communication method of and / or an extended next generation system based on these.
- the phrase “based on” does not mean “based only on,” unless expressly stated otherwise. In other words, the phrase “based on” means both “based only on” and “based at least on.”
- any reference to an element using the designation "first,” “second,” etc. as used herein does not generally limit the quantity or order of those elements. These designations may be used herein as a convenient way of distinguishing between two or more elements. Thus, reference to the first and second elements does not mean that only two elements can be taken or that the first element must somehow precede the second element.
- determining may encompass a wide variety of operations. For example, “determination” may be calculating, computing, processing, deriving, investigating, looking up (eg, table, database or other data) A search on structure), ascertaining, etc. may be considered as “determining”. Also, “determination” may be receiving (e.g. receiving information), transmitting (e.g. transmitting information), input (input), output (output), access (access) It may be considered as “determining” (eg, accessing data in memory) and the like. Also, “determination” is considered to be “determination” to resolve, select, choose, choose, establish, compare, etc. It is also good. That is, “determination” may be considered as “determining” some action.
- the terms “connected”, “coupled”, or any variation thereof are any direct or indirect connection between two or more elements or It means a bond and can include the presence of one or more intermediate elements between two elements “connected” or “connected” to each other.
- the coupling or connection between elements may be physical, logical or a combination thereof.
- the two elements are by using one or more wires, cables and / or printed electrical connections, and radio frequency as some non-limiting and non-exclusive examples. It can be considered “connected” or “coupled” to one another by using electromagnetic energy such as electromagnetic energy having wavelengths in the region, microwave region and light (both visible and invisible) regions.
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Abstract
Description
第1の態様では、ユーザ端末は、サービングセルで送信されるSSブロックを示すSSブロック送信情報を受信する。また、ユーザ端末は、当該SSブロック送信情報に基づいて、当該サービングセルのメジャメントを制御する。
第2の態様では、ユーザ端末は、一以上の周辺セルで送信されるSSブロックの範囲(range)を示すSSブロック送信情報を受信する。ユーザ端末は、当該SSブロック送信情報に基づいて、当該周辺セルのメジャメントを制御する。なお、以下では、第1の態様との相違点を中心に説明する。
第3の態様では、ユーザ端末は、一以上の周辺セルを含む各グループで送信されるSSブロックの範囲を示すSSブロック送信情報を受信する。ユーザ端末は、当該SSブロック送信情報に基づいて、グループ毎に周辺セルのメジャメントを制御する。以下では、第1及び/又は第2の態様との相違点を中心に説明する。
第4の態様では、周期、タイミング及び期間の少なくとも一つが異なる複数のメジャメント期間が設定される場合について説明する。第1~第3の態様で説明したSSブロック送信情報(例えば、上記リスト及び/又は上記範囲情報)は、当該複数のメジャメント期間の少なくとも一つに関連付けられてもよい。ユーザ端末は、当該SSブロック送信情報に基づいて、当該複数のメジャメント期間の少なくとも一つにおけるメジャメントを制御する。
第2~第4の態様では、SSブロック送信情報が、一以上の周辺セルで送信されるSSブロックの範囲(range)を示す場合を説明したが、当該SSブロック送信情報は、一以上の周辺セルで送信されるSSブロックを示してもよい。また、SSブロック送信情報は、所定周期のメジャメント期間の少なくとも一部において、一以上の周辺セルで送信されるSSブロックのSSブロックインデックスのリストであってもよい。
以下、本実施の形態に係る無線通信システムの構成について説明する。この無線通信システムでは、本発明の上記各態様のいずれか又はこれらの組み合わせを用いて通信が行われる。
図9は、本実施の形態に係る無線基地局の全体構成の一例を示す図である。無線基地局10は、複数の送受信アンテナ101と、アンプ部102と、送受信部103と、ベースバンド信号処理部104と、呼処理部105と、伝送路インターフェース106と、を備えている。なお、送受信アンテナ101、アンプ部102、送受信部103は、それぞれ1つ以上を含むように構成されればよい。
図11は、本実施の形態に係るユーザ端末の全体構成の一例を示す図である。ユーザ端末20は、複数の送受信アンテナ201と、アンプ部202と、送受信部203と、ベースバンド信号処理部204と、アプリケーション部205と、を備えている。なお、送受信アンテナ201、アンプ部202、送受信部203は、それぞれ1つ以上を含むように構成されればよい。
なお、上記実施形態の説明に用いたブロック図は、機能単位のブロックを示している。これらの機能ブロック(構成部)は、ハードウェア及び/又はソフトウェアの任意の組み合わせによって実現される。また、各機能ブロックの実現手段は特に限定されない。すなわち、各機能ブロックは、物理的及び/又は論理的に結合した1つの装置により実現されてもよいし、物理的及び/又は論理的に分離した2つ以上の装置を直接的及び/又は間接的に(例えば、有線及び/又は無線)で接続し、これら複数の装置により実現されてもよい。
なお、本明細書で説明した用語及び/又は本明細書の理解に必要な用語については、同一の又は類似する意味を有する用語と置き換えてもよい。例えば、チャネル及び/又はシンボルは信号(シグナリング)であってもよい。また、信号はメッセージであってもよい。参照信号は、RS(Reference Signal)と略称することもでき、適用される標準によってパイロット(Pilot)、パイロット信号などと呼ばれてもよい。また、コンポーネントキャリア(CC:Component Carrier)は、セル、周波数キャリア、キャリア周波数などと呼ばれてもよい。
Claims (6)
- サービングセルで送信される同期信号(SS)ブロックを示すSSブロック送信情報を受信する受信部と、
前記SSブロック送信情報に基づいて、所定周期のメジャメント期間における前記サービングセルのメジャメントを制御する制御部と、
を具備することを特徴とするユーザ端末。 - 前記SSブロック送信情報は、一以上の周辺セルで送信されるSSブロック又は該SSブロックの範囲を示し、
前記制御部は、前記SSブロック送信情報に基づいて、前記メジャメント期間における前記周辺セルのメジャメントを制御することを特徴とする請求項1に記載のユーザ端末。 - 前記SSブロック送信情報は、一以上の周辺セルを含む各グループで送信されるSSブロック又は該SSブロックの範囲を示し、
前記制御部は、前記SSブロック送信情報に基づいて、前記メジャメント期間における前記各グループ内の前記周辺セルのメジャメントを制御することを特徴とする請求項1に記載のユーザ端末。 - 周期、タイミング及び期間の少なくとも一つが異なる複数のメジャメント期間が設定される場合、前記SSブロック送信情報は、前記複数のメジャメント期間の少なくとも一つに関連付けられ、
前記制御部は、前記SSブロック送信情報に基づいて、前記複数のメジャメント期間の少なくとも一つにおけるメジャメントを制御することを特徴とする請求項1から請求項3のいずれかに記載のユーザ端末。 - 前記受信部は、システム情報又は上位レイヤシグナリングを用いて、前記SSブロック送信情報を受信することを特徴とする請求項1から請求項4のいずれかに記載のユーザ端末。
- ユーザ端末において、
サービングセルで送信される同期信号(SS)ブロックを示すSSブロック送信情報を受信する工程と、
前記SSブロック送信情報に基づいて、所定周期のメジャメント期間における前記サービングセルのメジャメントを制御する工程と、
を有することを特徴とする無線通信方法。
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EP17914265.8A EP3644641A4 (en) | 2017-06-21 | 2017-06-21 | USER EQUIPMENT AND WIRELESS COMMUNICATION PROCESS |
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INTEL CORPORATION: "S S block composition", 3GPP TSG-RAN WG1#89 RL-1707337, 7 May 2017 (2017-05-07), XP051262997, Retrieved from the Internet <URL:http://www.3gpp.org/ftp/tsg_ran/WGl_RL1/TSGR1_89/Docs/Rl-1707337.zip> [retrieved on 20170801] * |
LG ELECTRONICS: "Discussion on SS block composition and SS burst set composition", 3GPP TSG-RAN WG1#89 RL-1707588, 6 May 2017 (2017-05-06), XP051261930, Retrieved from the Internet <URL:http://www.3gpp.org/ftp/tsg_ran/WG1_RL1/TSGR1_89/Docs/Rl-1707588.zip> [retrieved on 20170801] * |
MEDIATEK: "WF On RRM measurement", 3GPP TSG-RAN WG1#89 RL-1709810, 19 May 2017 (2017-05-19), XP051285563, Retrieved from the Internet <URL:http://www.3gpp.org/ftp/tsg_ran/WG1_RL1/TSGR1_89/Docs/R1-1709810.zip> [retrieved on 20170801] * |
See also references of EP3644641A4 |
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WO2020147728A1 (zh) * | 2019-01-18 | 2020-07-23 | 华为技术有限公司 | 一种通信方法及设备 |
CN111465091A (zh) * | 2019-01-18 | 2020-07-28 | 华为技术有限公司 | 一种通信方法及设备 |
JP2022520831A (ja) * | 2019-02-15 | 2022-04-01 | 華為技術有限公司 | 情報設定方法及び装置 |
JP7301990B2 (ja) | 2019-02-15 | 2023-07-03 | 華為技術有限公司 | 情報設定方法及び装置 |
CN110324100A (zh) * | 2019-07-11 | 2019-10-11 | 成都中科微信息技术研究院有限公司 | 一种检测电台导致的干扰的方法及系统 |
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SG11201912854QA (en) | 2020-01-30 |
EP3644641A4 (en) | 2020-12-30 |
CN110786040A (zh) | 2020-02-11 |
US20200145854A1 (en) | 2020-05-07 |
CN110786040B (zh) | 2024-03-12 |
JP6972128B2 (ja) | 2021-11-24 |
EP3644641A1 (en) | 2020-04-29 |
BR112019027354A2 (pt) | 2020-07-07 |
JPWO2018235208A1 (ja) | 2020-04-23 |
IL271566A (en) | 2020-02-27 |
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